Up to 25 percent of a building’s heat loss is through the roof. To help reduce this energy waste, the International Energy Conservation Code (IECC) requires roof insulation in commercial buildings. Effective insulation helps the building owner save on energy costs year after year, while also helping create a comfortable indoor environment.

Fortunately, building professionals have available to them a range of insulation products that keep heat in during the winter and heat out during the summer. These include three common rigid foam insulation types: polyisocyanurate (polyiso), extruded polystyrene (XPS) and expanded polystyrene (EPS). Among these insulations are options that help the building team save money on both materials and labor.